The Harman audio products will be made available on the Galaxy S9, not the Galaxy S8. Samsung has already confirmed that Harman audio products will not appear in its Galaxy line of smartphones until 2018 as the deal would be wrapped up by Q3 2017.

And btw, this is a HUGE deal. Not only this acquisition will help Samsung to improve audio quality on their products and be a solid competitor for Apple's Beats, but they can also extend the IoT business in automotive.